Baleen whales feed principally on ________.
A. copepods and krill
B. fish and squid
C. diatoms and dinoflagellates
D. All of these are correct.
E. None of these is correct.
Answer: A
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Compared with conditions deeper within the Earth, temperature and pressure are lower at the surface
a. True b. False Indicate whether the statement is true or false
Describe in general terms how cell densities are derived using the kernel density estimation method.
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Of the chemicals that fall under the Toxic Substances Control Act, ________ have been thoroughly tested for toxicity and ________ have been tested for endocrine, nervous, or immune system damage
A) half; half B) 25; 10% C) 10; 10% D) half; 25% E) 10; 2%
The Rotterdam subway was built by
A. building the tunnel in segments which were flooded, sunk into position, then joined and pumped dry. B. draining water from below the city to allow excavation of a dry tunnel. C. baking the ground to harden the clays, then blasting the tunnel through. D. raising the tunnel on stilts to keep it above the local water table.